From: Bruno Haible <bruno@clisp.org>
Date: Fri, 6 Mar 2009 18:21:57 +0000 (+0100)
Subject: New module 'uninorm/u8-normcmp'.
X-Git-Tag: v0.1~6214
X-Git-Url: http://erislabs.org.uk/gitweb/?a=commitdiff_plain;h=68f2b34ff4db6fc25ff2e6122c6a9d1ca5b3edd7;p=gnulib.git

New module 'uninorm/u8-normcmp'.
---

diff --git a/ChangeLog b/ChangeLog
index cd19322ab..2160b9f32 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,14 @@
 2009-03-06  Bruno Haible  <bruno@clisp.org>
 
+	New module 'uninorm/u8-normcmp'.
+	* lib/uninorm.h (u8_normcmp, u16_normcmp, u32_normcmp): New
+	declarations.
+	* lib/uninorm/u8-normcmp.c: New file.
+	* lib/uninorm/u-normcmp.h: New file.
+	* modules/uninorm/u8-normcmp: New file.
+
+2009-03-06  Bruno Haible  <bruno@clisp.org>
+
 	* lib/w32spawn.h (dup_noinherit): Add cast, to avoid gcc warning.
 	Reported by Eric Blake.
 
diff --git a/lib/uninorm.h b/lib/uninorm.h
index 07ecacc1f..54497469c 100644
--- a/lib/uninorm.h
+++ b/lib/uninorm.h
@@ -145,6 +145,21 @@ extern uint32_t *
 		      uint32_t *resultbuf, size_t *lengthp);
 
 
+/* Compare S1 and S2, ignoring normalization.
+   NF must be either UNINORM_NFD or UNINORM_NFKD.
+   If successful, set *RESULT to -1 if S1 < S2, 0 if S1 = S2, 1 if S1 > S2, and
+   return 0.  Upon failure, return the error number.  */
+extern int
+       u8_normcmp (const uint8_t *s1, size_t n1, const uint8_t *s2, size_t n2,
+		   uninorm_t nf, int *result);
+extern int
+       u16_normcmp (const uint16_t *s1, size_t n1, const uint16_t *s2, size_t n2,
+		    uninorm_t nf, int *result);
+extern int
+       u32_normcmp (const uint32_t *s1, size_t n1, const uint32_t *s2, size_t n2,
+		    uninorm_t nf, int *result);
+
+
 /* Normalization of a stream of Unicode characters.
 
    A "stream of Unicode characters" is essentially a function that accepts an
diff --git a/lib/uninorm/u-normcmp.h b/lib/uninorm/u-normcmp.h
new file mode 100644
index 000000000..288bcab86
--- /dev/null
+++ b/lib/uninorm/u-normcmp.h
@@ -0,0 +1,60 @@
+/* Normalization insensitive comparison of UTF-8 strings.
+   Copyright (C) 2009 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+int
+FUNC (const UNIT *s1, size_t n1, const UNIT *s2, size_t n2,
+      uninorm_t nf, int *result)
+{
+  UNIT *norms1;
+  size_t norms1_length;
+  UNIT *norms2;
+  size_t norms2_length;
+  int cmp;
+
+  /* Normalize S1.  */
+  norms1 = U_NORMALIZE (nf, s1, n1, NULL, &norms1_length);
+  if (norms1 == NULL)
+    return errno;
+
+  /* Normalize S2.  */
+  norms2 = U_NORMALIZE (nf, s2, n2, NULL, &norms2_length);
+  if (norms2 == NULL)
+    {
+      int saved_errno = errno;
+      free (norms1);
+      return saved_errno;
+    }
+
+  /* Compare the normalized strings.  */
+  cmp = U_CMP (norms1, norms2, MIN (norms1_length, norms2_length));
+  if (cmp == 0)
+    {
+      if (norms1_length < norms2_length)
+	cmp = -1;
+      else if (norms1_length > norms2_length)
+	cmp = 1;
+    }
+  else if (cmp > 0)
+    cmp = 1;
+  else if (cmp < 0)
+    cmp = -1;
+
+  free (norms2);
+  free (norms1);
+  *result = cmp;
+  return 0;
+}
diff --git a/lib/uninorm/u8-normcmp.c b/lib/uninorm/u8-normcmp.c
new file mode 100644
index 000000000..aa8dc8e07
--- /dev/null
+++ b/lib/uninorm/u8-normcmp.c
@@ -0,0 +1,33 @@
+/* Normalization insensitive comparison of UTF-8 strings.
+   Copyright (C) 2009 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "uninorm.h"
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include "minmax.h"
+#include "unistr.h"
+
+#define FUNC u8_normcmp
+#define UNIT uint8_t
+#define U_NORMALIZE u8_normalize
+#define U_CMP u8_cmp
+#include "u-normcmp.h"
diff --git a/modules/uninorm/u8-normcmp b/modules/uninorm/u8-normcmp
new file mode 100644
index 000000000..f1e45186a
--- /dev/null
+++ b/modules/uninorm/u8-normcmp
@@ -0,0 +1,26 @@
+Description:
+Normalization insensitive comparison of UTF-8 strings.
+
+Files:
+lib/uninorm/u8-normcmp.c
+lib/uninorm/u-normcmp.h
+
+Depends-on:
+uninorm/u8-normalize
+unistr/u8-cmp
+minmax
+
+configure.ac:
+
+Makefile.am:
+lib_SOURCES += uninorm/u8-normcmp.c
+
+Include:
+"uninorm.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+